Etymology and Alternative Spellings
Metallic cabasas are generally referred to as afuche. The instrument consists of several loops of metallic beads that move against a hollow, metallic cylinder. 
Although closely related to the African Shekere, the afuche is an ingenious substitution for the native Latin American instrument known as the Cabasa. The afuche was ceated by Latin Percussion founder Martin Cohen in the latter half of the 20th century. Because of the close relations of these instruments, composers and performers alike often use the terms afuche and cabasa interchangeably. However, it is important to the integrity of the music that the diligent performer determine the composers intentions. For more on this see Cabasa. 
The non-dominant hand rests on the loops of metallic beads while the other hand grabs the wooden/plastic handle and rotates the instrument back and forth in a clock-wise, counter clock-wise motion.
- John H., Beck. Encyclopedia of Percussion. New York & London: Garland Publishing, Inc., 1995. (accessed January 19, 2013).
- Blades, James. Percussion Instruments and Their History. Wesport: The Bold Strummer, Ltd., 2005, pp.450. (accessed January 27, 2013)